Inventor · disambiguated record
Yoshinari Koyama
Also filed as: KOYAMA YOSHINARI
49 granted patents·10 pending applications·667 citations·filing 1989–2022
98Inventor score
Files withNISSAN CHEMICAL IND LTD34IDEMITSU PETROCHEMICAL CO12KOYAMA YOSHINARI4HOYA CORP2FUJIMOTO OSAMU1
Top patents by PatentIndex Score
59 records- 0192US7553474B2Method for producing metal oxide solNISSAN CHEMICAL IND LTD·Filed 2005·Granted Jun 30, 2009·10 cites·12 claims
- 0290US6713170B1Hard coating material and film comprising the sameNIPPON KAYAKU KK·Filed 1999·Granted Mar 30, 2004·76 cites·5 claims
- 0390US6626987B1Modified metal oxide sol, coating composition and optical elementNISSAN CHEMICAL IND LTD·Filed 2000·Granted Sep 30, 2003·39 cites·11 claims
- 0490US6296943B1Method for producing composite sol, coating composition, and optical elementNISSAN CHEMICAL IND LTD·Filed 1998·Granted Oct 2, 2001·64 cites·14 claims
- 0587US9243165B2Film-forming compositionKATO TAKU·Filed 2011·Granted Jan 26, 2016·4 cites·15 claims
- 0686US8034846B2Method for producing modified zirconium oxide-tin oxide composite solNISSAN CHEMICAL IND LTD·Filed 2007·Granted Oct 11, 2011·7 cites·8 claims
- 0786US6291535B1Silica-magnesium fluoride hydrate composite sols and process for their preparationNISSAN CHEMICAL IND LTD·Filed 1999·Granted Sep 18, 2001·48 cites·5 claims
- 0883US7556682B2Zirconium oxide-tin oxide composite sol, coating composition and optical memberNISSAN CHEMICAL IND LTD·Filed 2006·Granted Jul 7, 2009·6 cites·21 claims
- 0983US5635587AProcess for manufacturing polyarylene sulfideIDEMITSU PETROCHEMICAL CO·Filed 1994·Granted Jun 3, 1997·32 cites·11 claims
- 1082US6750319B2Process for producing polyarylene sulfide and apparatus used thereinIDEMITSU PETROCHEMICAL CO·Filed 2002·Granted Jun 15, 2004·17 cites·14 claims
- 1181US7018574B2Process for removing volatile components in polyarylene sulfidePETROLEUM ENERGY CT A JURIDICA·Filed 2003·Granted Mar 28, 2006·21 cites·20 claims
- 1281US6355694B1Modified stannic oxide—zirconium oxide complex sol and preparation method thereofNISSAN CHEMICAL IND LTD·Filed 2000·Granted Mar 12, 2002·23 cites·2 claims
- 1381US5194580AProcess for preparing polyarylene sulfides under reduced pressureIDEMITSU PETROCHEMICAL CO·Filed 1989·Granted Mar 16, 1993·27 cites·19 claims
- 1480US9534144B2Film-forming compositionNISSAN CHEMICAL IND LTD·Filed 2015·Granted Jan 3, 2017·1 cites·11 claims
- 1579US5143554AProcess for washing powdery and/or granular resins and a washing device thereforIDEMITSU PETROCHEMICAL CO·Filed 1990·Granted Sep 1, 1992·34 cites·12 claims
- 1676US12286562B2Metal oxide particles containing titanium oxide coated with silicon dioxide-stannic oxide complex oxideNISSAN CHEMICAL IND LTD·Filed 2022·Granted Apr 29, 2025·0 cites·13 claims
- 1774US7919016B2Conductive tin oxide sol and process for producing sameNISSAN CHEMICAL IND LTD·Filed 2010·Granted Apr 5, 2011·1 cites·5 claims
- 1872US5906679ACoating compositions employing zinc antimonate anhydride particlesNISSAN CHEMICAL IND LTD·Filed 1997·Granted May 25, 1999·26 cites·4 claims
- 1972US5898061AContinuous process for producing polyarylene sulfideIDEMITSU PETROCHEMICAL CO·Filed 1997·Granted Apr 27, 1999·27 cites·16 claims
- 2071US7208229B2Modified metal oxide sol, coating compositions and optical elementNISSAN CHEMICAL IND LTD·Filed 2003·Granted Apr 24, 2007·11 cites·6 claims
- 2169US6306513B1Optical element having cured filmHOYA CORP·Filed 2000·Granted Oct 23, 2001·12 cites·32 claims
- 2268US5262137AMethod for recovering lithium chlorideIDEMITSU PETROCHEMICAL CO·Filed 1991·Granted Nov 16, 1993·15 cites·8 claims
- 2365US6040372AHydrated zinc stannate sols, coating compositions and optical elementsNISSAN CHEMICAL IND LTD·Filed 1998·Granted Mar 21, 2000·16 cites·12 claims
- 2465US5891362AHydrated zinc stannate sols, coating compositions and optical elementsNISSAN CHEMICAL IND LTD·Filed 1996·Granted Apr 6, 1999·15 cites·16 claims
- 2564US7563827B2Modified stannic oxide sol, stannic oxide-zirconium oxide composite sol, coating composition and optical elementNISSAN CHEMICAL IND LTD·Filed 2003·Granted Jul 21, 2009·11 cites·1 claims
- 2664US5856433AApparatus for manufacturing polyarylene sulfide and process for manufacturing polyarlene sulfide using the apparatusIDEMITSU PETROCHEMICAL CO·Filed 1997·Granted Jan 5, 1999·27 cites·4 claims
- 2758US2007297966A1Conductive tin oxide sol and process for producing sameNISSAN CHEMICAL IND LTD·Filed 2007·Application pending·0 cites
- 2857US6646015B1Process for producing diantimony pentoxide solNISSAN CHEMICAL IND LTD·Filed 2003·Granted Nov 11, 2003·2 cites·7 claims
- 2957US5552083ASol and fine powder of sodium magnesium fluoride and processes for their productionNISSAN CHEMICAL IND LTD·Filed 1994·Granted Sep 3, 1996·12 cites·12 claims
- 3056US8747542B2Method for producing rutile titanium oxide solMURAKAMI NATSUMI·Filed 2012·Granted Jun 10, 2014·1 cites·4 claims
- 3156US2014285897A1Metal oxide composite sol, coating composition, and optical memberNISSAN CHEMICAL IND LTD·Filed 2014·Application pending·0 cites
- 3254US2010239872A1Metal oxide composite sol, coating composition, and optical memberNISSAN CHEMICAL IND LTD·Filed 2008·Application pending·0 cites
- 3353US10669426B2Inorganic oxide microparticles having amphiphilic organic silane compound bonded thereto, organic solvent dispersion thereof, and composition for film formationNISSAN CHEMICAL IND LTD·Filed 2017·Granted Jun 2, 2020·0 cites·10 claims
- 3452US5707552AZinc antimonate anhydride and method for producing sameNISSAN CHEMICAL IND LTD·Filed 1996·Granted Jan 13, 1998·10 cites·14 claims
- 3551US6001164AHydrated zinc stannate sols, coating compositions and optical elementsNISSAN CHEMICAL IND LTD·Filed 1998·Granted Dec 14, 1999·10 cites·10 claims
- 3651US5891565ASol and fine powder of sodium magnesium fluoride and processes for their productionNISSAN CHEMICAL IND LTD·Filed 1997·Granted Apr 6, 1999·10 cites·20 claims
- 3751US5167775AMethod for recovery of solvent used in production of polyarylene sulfideIDEMITSU PETROCHEMICAL CO·Filed 1989·Granted Dec 1, 1992·14 cites·9 claims
- 3850US8193253B2Organosol of fluoride colloid particle and method for producing the sameKOYAMA YOSHINARI·Filed 2007·Granted Jun 5, 2012·0 cites·6 claims
- 3950US7737187B2Process for producing inorganic oxide organosolNISSAN CHEMICAL IND LTD·Filed 2004·Granted Jun 15, 2010·2 cites·8 claims
- 4050US2010221556A1Modified metal-oxide composite sol, coating composition, and optical memberNISSAN CHEMICAL IND LTD·Filed 2008·Application pending·0 cites
- 4147US5766512AZinc antimonate anhydride and method for producing sameNISSAN CHEMICAL IND LTD·Filed 1996·Granted Jun 16, 1998·7 cites·5 claims
- 4247US2014199554A1Metal oxide particles containing titanium oxide coated with silicon dioxide-stannic oxide complex oxideKOYAMA YOSHINARI·Filed 2012·Application pending·0 cites
- 4347US2007196567A1Method for producing plastic lensHOYA CORP·Filed 2005·Application pending·0 cites
- 4446US5583166AProcess for production of polymer particlesIDEMITSU PETROCHEMICAL CO·Filed 1995·Granted Dec 10, 1996·10 cites·16 claims
- 4544US2004164443A1Process for granulating polyarylene sulfide based-resinIDEMITSU PETROCHEMICAL CO·Filed 2003·Application pending·0 cites
- 4644US2006116429A1Process for producing modified stannic oxide sol and stannic oxide/zirconium oxide composite solNISSAN CHEMICAL IND LTD·Filed 2005·Application pending·0 cites
- 4743US9023147B2Method for producing rutile type titanium oxide solNISSAN CHEMICAL IND LTD·Filed 2012·Granted May 5, 2015·0 cites·4 claims
- 4843US7476695B2Modified stannic oxide-zirconium oxide complex sol and method for preparing sameNISSAN CHEMICAL IND LTD·Filed 2005·Granted Jan 13, 2009·0 cites·2 claims
- 4943US5667725ASol and fine powder of sodium magnesium fluoride and processes for their productionNISSAN CHEMICAL IND LTD·Filed 1996·Granted Sep 16, 1997·6 cites·16 claims
- 5042US7291652B2Diantimony pentoxide sol and method for its preparationNISSAN CHEMICAL IND LTD·Filed 2004·Granted Nov 6, 2007·0 cites·10 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →